Laser materials processing

Published research highlights

	CW ND: YAG laser welding of dissimilar sheet metals Researchers continue to investigate the problems experienced in the welding of dissimilar metals. Typical problems include brittle intermetallic phase formation and a product that is prone to cracking. This paper reports the results of welding of aluminium/copper (used in electronics), stainless steel/titanium (used in the medical industry) and stainless steel/aluminium welding (yacht building).

	Effect of pre/post T6 treatment on the mechanical properties of laser welded SSM cast A356 aluminium alloy This paper is set against the background of the increased use of aluminium alloys in the automobile industry, for lighter vehicles with reduced fuel use. Laser welding is widely used, but the welding of aluminium poses problems.

	Improvement of the Surface Finish obtained by Laser Ablation with Nd: YAG Laser on Pre-ablated Tool Steel Surface finish is an important requirement for tool and die makers and remains a challenge with conventional machining technologies. Researchers explain the results of their focus on the improvement of surface finish on pre-ablated tool steel.